// JavaScript Document
jQuery.extend({

	createUploadIframe: function(id, uri) {
		// create frame
		var frameId = 'jUploadFrame' + id;

		if(window.ActiveXObject) {
			// var io = document.createElement('<iframe id="' + frameId
			// + '" name="' + frameId + '" />');
			if(jQuery.browser.version == "9.0" ||
				jQuery.browser.version == "10.0") {
				var io = document.createElement('iframe');
				io.id = frameId;
				io.name = frameId;
			} else if(jQuery.browser.version == "6.0" ||
				jQuery.browser.version == "7.0" ||
				jQuery.browser.version == "8.0") {
				var io = document.createElement('<iframe id="' +
					frameId + '" name="' + frameId + '" />');
				if(typeof uri == 'boolean') {
					io.src = 'javascript:false';
				} else if(typeof uri == 'string') {
					io.src = uri;
				}
			}
		} else {
			var io = document.createElement('iframe');
			io.id = frameId;
			io.name = frameId;
		}
		io.style.position = 'absolute';
		io.style.top = '-1000px';
		io.style.left = '-1000px';

		document.body.appendChild(io);

		return io;
	},
	createUploadForm: function(id, fileElementId, data) {
		// create form
		var formId = 'jUploadForm' + id;
		var fileId = 'jUploadFile' + id;
		var form = jQuery('<form  action="" method="POST" name="' +
			formId + '" id="' + formId +
			'" enctype="multipart/form-data"></form>');
		for(var ii in fileElementId) {
			var oldElement = jQuery('#' + fileElementId[ii]);
			var newElement = jQuery(oldElement).clone();
			jQuery(oldElement).attr('id', fileId);
			jQuery(oldElement).before(newElement);
			jQuery(oldElement).appendTo(form);
		}
		// add data
		if(data) {
			for(var i in data) {
				$(
					'<input type="hidden" name="' + i + '" value="' +
					data[i] + '" />').appendTo(form);
			}
		}
		// set attributes
		jQuery(form).css('position', 'absolute');
		jQuery(form).css('top', '-1200px');
		jQuery(form).css('left', '-1200px');
		jQuery(form).appendTo('body');
		return form;
	},

	ajaxFileUpload: function(s) {
		// TODO introduce global settings, allowing the client to modify
		// them for all requests, not only timeout
		s = jQuery.extend({}, jQuery.ajaxSettings, s);
		var id = s.id;
		// var id = s.fileElementId;
		var form = jQuery.createUploadForm(id, s.fileElementId, s.data);
		var io = jQuery.createUploadIframe(id, s.secureuri);
		var frameId = 'jUploadFrame' + id;
		var formId = 'jUploadForm' + id;

		if(s.global && !jQuery.active++) {
			// Watch for a new set of requests
			jQuery.event.trigger("ajaxStart");
		}
		var requestDone = false;
		// Create the request object
		var xml = {};
		if(s.global) {
			jQuery.event.trigger("ajaxSend", [xml, s]);
		}

		var uploadCallback = function(isTimeout) {
			// Wait for a response to come back
			var io = document.getElementById(frameId);
			try {
				if(io.contentWindow) {
					xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML :
						null;
					xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument :
						io.contentWindow.document;
				} else if(io.contentDocument) {
					xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML :
						null;
					xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument :
						io.contentDocument.document;
				}
			} catch(e) {
				jQuery.handleError(s, xml, null, e);
			}
			if(xml || isTimeout == "timeout") {
				requestDone = true;
				var status;
				try {
					status = isTimeout != "timeout" ? "success" :
						"error";
					// Make sure that the request was successful or
					// notmodified
					if(status != "error") {
						// process the data (runs the xml through
						// httpData regardless of callback)
						var data = jQuery.uploadHttpData(xml,
							s.dataType);
						if(s.success) {
							// ifa local callback was specified, fire it
							// and pass it the data
							s.success(data, status);
						}
						if(s.global) {
							// Fire the global callback
							jQuery.event.trigger("ajaxSuccess", [xml,
								s
							]);
						}
					} else {
						jQuery.handleError(s, xml, status);
					}

				} catch(e) {
					status = "error";
					jQuery.handleError(s, xml, status, e);
				}
				if(s.global) {
					// The request was completed
					jQuery.event.trigger("ajaxComplete", [xml, s]);
				}

				// Handle the global AJAX counter
				if(s.global && !--jQuery.active) {
					jQuery.event.trigger("ajaxStop");
				}
				if(s.complete) {
					s.complete(xml, status);
				}
				jQuery(io).unbind();
				setTimeout(function() {
					try {
						jQuery(io).remove();
						jQuery(form).remove();
					} catch(e) {
						jQuery.handleError(s, xml, null, e);
					}
				}, 100);
				xml = null;
			}
		};
		// Timeout checker
		if(s.timeout > 0) {
			setTimeout(function() {
				if(!requestDone) {
					uploadCallback("timeout");
				}
			}, s.timeout);
		}
		try {
			var form = jQuery('#' + formId);
			jQuery(form).attr('action', s.url);
			jQuery(form).attr('method', 'POST');
			jQuery(form).attr('target', frameId);
			if(form.encoding) {
				form.encoding = 'multipart/form-data';
			} else {
				form.enctype = 'multipart/form-data';
			}
			jQuery(form).submit();

		} catch(e) {
			jQuery.handleError(s, xml, null, e);
		}
		/*
		 * if(window.attachEvent){
		 * document.getElementById(frameId).attachEvent('onload',
		 * uploadCallback); } else{
		 * document.getElementById(frameId).addEventListener('load',
		 * uploadCallback, false); }
		 */
		jQuery('#' + frameId).load(uploadCallback);
		return {
			abort: function() {}
		};

	},

	uploadHttpData: function(r, type) {
		var data = !type;
		data = type == "xml" || data ? r.responseXML : r.responseText;
		// ifthe type is "script", eval it in global context
		if(type == "script") {
			jQuery.globalEval(data);
		}
		// Get the JavaScript object, ifJSON is used.
		if(type == "jsonp") {
			/*data = r.responseText;
			 var start = data.indexOf(">");
			 if (start != -1) {
			 var end = data.indexOf("<", start + 1);
			 if (end != -1) {
			 data = data.substring(start + 1, end);
			 }
			 }
			 console.log(22);
			 var position = data.indexOf('}')+1;
			 console.log(23);
			 data = data.substring(0,position);
			 console.log(24);
			 /!*eval("data = " + data);*!/
			 console.log(25);
			 data = jQuery.parseJSON($.parseHTML(jQuery(data).text(), document, true));
			 console.log(26 + data);*/
			data = r.responseText;
			var rx = new RegExp("<pre.*?>(.*?)</pre>", "i");
			var am = rx.exec(data);
			//this is the desired data extracted
			data = (am) ? am[1] : ""; //the only submatch or empty
			// var position = data.indexOf('}') + 1;
			// data = data.substring(0,position);
			eval("data = " + data);
		}
		if(type == "json") {
			data = r.responseText;
			var rx = new RegExp("<pre.*?>(.*?)</pre>", "i");
			var am = rx.exec(data);
			data = (am) ? am[1] : ""; //the only submatch or empty
			eval("data = " + data);
		}

		// evaluate scripts within html
		if(type == "html") {
			jQuery("<div>").html(data).evalScripts();
		}
		return data;
	},
	/*
	 * handleError: function( s, xml, status, e ) { // If a local
	 * callback was specified, fire it if ( s.error ) s.error( xml,
	 * status, e );
	 *  // Fire the global callback if ( s.global )
	 * jQuery.event.trigger( "ajaxError", [xml, s, e] ); }
	 */
	handleError: function(s, xhr, status, e) {
		console.log(s);
		console.log(xhr);
		console.log(status);
		console.log(e);
		// If a local callback was specified, fire it
		if(s.error) {
			s.error.call(s.context || s, xhr, status, e);
		}
		// Fire the global callback
		if(s.global) {
			(s.context ? jQuery(s.context) : jQuery.event).trigger(
				"ajaxError", [xhr, s, e]);
		}
	}
});